gitlab-org--gitlab-foss/spec/javascripts/notebook/lib/highlight_spec.js

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import Prism from '~/notebook/lib/highlight';
describe('Highlight library', () => {
it('imports python language', () => {
expect(Prism.languages.python).toBeDefined();
});
it('uses custom CSS classes', () => {
const el = document.createElement('div');
el.innerHTML = Prism.highlight('console.log("a");', Prism.languages.javascript);
expect(el.querySelector('.s')).not.toBeNull();
expect(el.querySelector('.nf')).not.toBeNull();
});
});